﻿// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#nullable disable

using System.Drawing;

namespace System.Windows.Forms
{
    public partial class ToolStripSplitButton
    {
        /// <summary>
        ///  This class represents the item to the left of the dropdown [ A |v]  (e.g the "A")
        ///  It exists so that we can use our existing methods for text and image layout
        ///  and have a place to stick certain state information like pushed and selected
        ///  Note since this is NOT an actual item hosted on the ToolStrip - it won't get things
        ///  like MouseOver, won't be laid out by the ToolStrip, etc etc.  This is purely internal
        ///  convenience.
        /// </summary>
        private class ToolStripSplitButtonButton : ToolStripButton
        {
            private readonly ToolStripSplitButton _owner;

            public ToolStripSplitButtonButton(ToolStripSplitButton owner)
            {
                this._owner = owner;
            }

            public override bool Enabled
            {
                get
                {
                    return _owner.Enabled;
                }
                set
                {
                    // do nothing
                }
            }

            public override ToolStripItemDisplayStyle DisplayStyle
            {
                get
                {
                    return _owner.DisplayStyle;
                }
                set
                {
                    // do nothing
                }
            }

            public override Padding Padding
            {
                get
                {
                    return _owner.Padding;
                }
                set
                {
                    // do nothing
                }
            }

            public override ToolStripTextDirection TextDirection
            {
                get
                {
                    return _owner.TextDirection;
                }
            }

            public override Image Image
            {
                get
                {
                    if ((_owner.DisplayStyle & ToolStripItemDisplayStyle.Image) == ToolStripItemDisplayStyle.Image)
                    {
                        return _owner.Image;
                    }
                    else
                    {
                        return null;
                    }
                }
                set
                {
                    // do nothing
                }
            }

            public override bool Selected
            {
                get
                {
                    if (_owner is not null)
                    {
                        return _owner.Selected;
                    }

                    return base.Selected;
                }
            }

            public override string Text
            {
                get
                {
                    if ((_owner.DisplayStyle & ToolStripItemDisplayStyle.Text) == ToolStripItemDisplayStyle.Text)
                    {
                        return _owner.Text;
                    }
                    else
                    {
                        return null;
                    }
                }
                set
                {
                    // do nothing
                }
            }
        }
    }
}
